# Synology SHR vs RAID 1: Two-Bay and Expansion Decisions

Canonical: https://cloudzat.com/synology-shr-vs-raid-1/
Full Markdown: https://cloudzat.com/synology-shr-vs-raid-1/index.md
Cluster context: https://cloudzat.com/ai/synology-technical/context.json

Purpose: Compare Synology SHR and RAID 1 for two-bay NAS systems, mirroring, mixed drives, later expansion and replacement-drive planning.
Direct answer: For a permanent two-bay mirror with equal drives, RAID 1 is easy to understand and perfectly reasonable. Choose SHR when future migration, mixed drive sizes or adding more disks in a larger system is part of the ownership plan.

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